Inner plate of engine hood

Abstract

The utility model relates to a vehicle body part, and discloses an engine hood inner plate, the engine hood inner plate is installed below an engine hood outer plate, the engine hood inner plate and the engine hood outer plate are both of a metal plate structure, the engine hood inner plate comprises a weakening area, a plurality of vertical ribs are arranged in the weakening area at intervals, and the vertical ribs are arranged in the weakening area; a plurality of vertical ribs are arranged in the weakening area, the vertical ribs and the edge of the weakening area form a grid structure, the section of each vertical rib comprises a first bent part and a second bent part, the first bent parts are attached to the engine hood outer plate, the second bent parts are bent downwards from the two ends of the first bent parts and then bent towards the two sides, and the second bent parts are suspended below the engine hood outer plate; the assembly area is arranged on the periphery of the weakening area in a surrounding mode and provided with a plurality of fixing pieces, and the fixing pieces are used for fixing the engine hood inner plate to the lower portion of the engine hood outer plate.

Description

TECHNICAL FIELD

[0001] The present application relates to a vehicle body component, in particular to an engine hood inner panel. BACKGROUND

[0002] The engine hood inner panel needs to have good cushioning and energy absorption characteristics. For example, by using design such as collapse groove and weakening hole, the engine hood inner panel can be bent or deformed during the collision to effectively absorb the collision energy and reduce the impact force on the head of the pedestrian.

[0003] The traditional engine hood inner panel is usually designed with a triangle hole structure which is not easy to deform to ensure the strength. However, when the strength is ensured, the collapse ability is usually poor. Therefore, an engine hood inner panel which can ensure the strength and has a certain collapse ability is needed. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide an engine hood inner panel which can ensure the strength and has a certain collapse ability.

[0005] In order to achieve the above purpose, the present application provides an engine hood inner panel, which is installed below an engine hood outer panel, and the engine hood inner panel and the engine hood outer panel are both sheet metal structures. The engine hood inner panel comprises: a weakening area, the weakening area is provided with a plurality of vertical ribs arranged at intervals, the plurality of vertical ribs and the edges of the weakening area form a grid structure, the cross section of the vertical rib comprises a first bending part and a second bending part, the first bending part is attached to the engine hood outer panel, the second bending part is first bent downward from both ends of the first bending part and then bent to both sides, and the second bending part is suspended below the engine hood outer panel; and an assembly area, the assembly area is arranged around the weakening area, and the assembly area is provided with a plurality of fixing parts, the fixing parts are used to fix the engine hood inner panel below the engine hood outer panel.

[0006] In an embodiment, glue is coated between the first bending part and the engine hood outer panel.

[0007] In another embodiment, the engine hood inner panel further comprises: a reinforcing area, the reinforcing area is sheet metal at the junction of the weakening area and the assembly area, the reinforcing area comprises a reinforcing rib, the reinforcing rib extends along the edge of the weakening area, the cross section of the second rib comprises a third bending part and a fourth bending part, the third bending part is suspended below the engine hood outer panel, the fourth bending part is obtained by bending upward from both ends of the third bending part and then bending to both sides, and the fourth bending part is attached to the engine hood outer panel, so that the second rib and the engine hood outer panel form a closed cavity.

[0008] In an embodiment, the weakening area is further provided with a plurality of through holes arranged at intervals.

[0009] In another embodiment, the fixing part is a hem structure, and the hem structure is used to wrap the edge of the engine hood outer panel to realize the assembly of the engine hood inner panel and the engine hood outer panel.

[0010] In still another embodiment, the inner hood panel further comprises: a hinge mounting structure, the hinge mounting structure being configured to mount a hinge, the hinge being configured to secure the inner hood panel and the outer hood panel in the engine compartment.

[0011] In one embodiment, the second bending portion has a height of 6mm to 10mm above the outer hood panel; and the third bending portion has a height of 45mm to 55mm above the outer hood panel.

[0012] In still another embodiment, the third bending portion 1211 has a width of 45mm to 55mm.

[0013] In another embodiment, the cell grid of the grid structure has a length or width of 100mm to 140mm.

[0014] In one embodiment, the inner hood panel and the outer hood panel are mounted together on the engine compartment, and the reinforcement region further comprises: a lock body configured to lock the inner hood panel on the engine compartment; or a rubber plug configured to abut against the edge of the engine compartment to block foreign matters from entering the engine compartment.

[0015] Compared with the prior art, the inner hood panel of the embodiment of the present application has the following beneficial effects:

[0016] The inner hood panel of the embodiment of the present application has a weakening region in the middle region, the vertical rib of the weakening region and the edge of the weakening region form a grid structure, the grid structure can better collapse when coping with external stress compared with the traditional triangular hole. Further, the second bending portion located at the edge of the rib is suspended above the outer hood panel, and the rib and the outer hood panel do not form a closed cavity, so the local stiffness can be weakened to the greatest extent, and the inner hood panel provided with the weakening region of the present application meets the requirements of pedestrian protection. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a schematic view of an assembled inner hood panel and outer hood panel according to an embodiment of the present application.

[0018] Figure 2 FIG. 2 is a schematic view of the division of regions of an inner hood panel according to an embodiment of the present application.

[0019] Figure 3 FIG. 3 is a schematic view of the structure of an inner hood panel according to an embodiment of the present application.

[0020] Figure 4 FIG. 4 is a schematic view of the cross section of a vertical rib according to an embodiment of the present application.

[0021] Figure 5 FIG. 5 is a schematic view of the cross section of a reinforcing rib according to an embodiment of the present application.

[0022] Reference signs:

[0023] 1, inner panel, 2, outer panel, 3, engine compartment, 10, weakened area, 101, vertical rib, 102, through hole, 1011, first bending part, 1012, second bending part, 1013, glue, 11, assembly area, 111, fixing part, 112, hinge mounting structure, 12, reinforced area, 121, reinforcing rib, 122, lock body, 1211, third bending part, 1212, fourth bending part. DETAILED DESCRIPTION

[0024] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0025] The engine will produce vibration and noise during operation, and the engine cover with high strength can better inhibit the transmission of engine vibration, and the engine cover with high strength usually has good crash test results. Therefore, the traditional manufacturing idea usually manufactures the engine cover with high structural strength.

[0026] But with the emphasis on pedestrian protection, local structural weakening of the engine cover is needed, which absorbs as much collision energy as possible to protect the collided pedestrians on the basis of maintaining basic strength.

[0027] As shown in Figure 1 , the engine cover includes an inner panel 1 and an outer panel 2, and the lower inner panel 1 is the main source of structural strength of the engine cover, so the improvement of the inner panel 1 becomes the top priority.

[0028] Therefore, as shown in Figure 2 and Figure 3 , an inner panel 1 of the engine cover according to the preferred embodiment of the present application is provided, which is installed below the outer panel 2 of the engine cover. The inner panel 1 and the outer panel 2 of the engine cover are both sheet metal structures, and the inner panel 1 is divided into a weakened area 10 and an installation area.

[0029] The weakened area 10 is provided with a plurality of vertical ribs 101 arranged at intervals, and the plurality of vertical ribs 101 form a grid structure with the edges of the weakened area 10. The cross section of the vertical rib 101 includes a first bending part 1011 and a second bending part 1012. The first bending part 1011 is attached to the outer panel 2 of the engine cover, and the second bending part 1012 is first bent downward from both ends of the first bending part 1011 and then bent to both sides. The second bending part 1012 is suspended below the outer panel 2 of the engine cover.

[0030] The assembling area 11 is surrounded by the weakened area 10, and the assembling area 11 is provided with a plurality of fixing members 111 for fixing the inner panel 1 under the outer panel 2.

[0031] According to the above scheme, the shape of the non-deformable rib in the central area of the inner panel 1 is replaced by a grid structure with certain deformation capacity, and the weakened area 10 is surrounded by the assembling area. The central area of the inner panel 1 is the area that is easy to contact pedestrians in a collision, so the improvement of the weakened area 10 enables the inner panel 1 to absorb a certain amount of collision energy in a collision.

[0032] Further, in the cross-sectional structure of the rib, the second bending part 1012 at the edge of the rib is suspended compared to the outer panel 2, and only the first bending part 1011 in the middle of the rib is in contact with the outer panel 2, so that a closed cavity structure cannot be formed, further reducing the structural strength of the weakened area 10, and being more beneficial to pedestrian protection in a collision.

[0033] It can be understood that, according to the size of the vehicle and the size of the engine compartment 3, the grid structure formed can be different, for example, the grid structure formed contains three grid units as exemplified in the drawings.

[0034] In this application, the drawings Figure 2 and Figure 3 are top views of the inner panel 1, in order to facilitate understanding of the structural relationship between the inner panel 1 and the outer panel 2, in the sectional views of Figure 4 and Figure 5 , compared to Figure 3 , the outer panel 2 is added.

[0035] On the basis of the above scheme, as shown in Figure 4 , in an embodiment of the present application, a glue 1013 is coated between the first bending part 1011 and the outer panel 2.

[0036] It can be understood that, in order to be able to smoothly glue, the first bending part 1011 and the outer panel 2 can appropriately have a certain gap, but as a whole, it can still be considered to meet the technical features of "the first bending part 1011 and the outer panel 2 are attached", and the gap caused by process requirements, manufacturing errors, etc. does not affect the implementation of the above scheme.

[0037] The glue 1013 layer can play a buffering role to reduce the transmission of vibration from the inner plate to the outer plate, thereby reducing the noise during driving. At the same time, during the driving of the vehicle, the engine cover will be subjected to various external forces such as vibration, wind pressure, etc. The glue 1013 can effectively prevent relative displacement between the inner and outer plates, appropriately enhance the overall strength of the engine cover, and make it better resist deformation.

[0038] In another embodiment, as shown in Figure 2 and Figure 5 The engine cover inner plate 1 also includes a reinforcement area 12. The reinforcement area 12 is the sheet metal at the junction of the weakening area 10 and the assembly area 11. The reinforcement area 12 includes a reinforcing rib 121 extending along the edge of the weakening area 10. The cross section of the second rib includes a third bending part 1211 and a fourth bending part 1212. The third bending part 1211 is suspended below the engine cover outer plate 2. The fourth bending part 1212 is bent upward from both ends of the third bending part 1211 and then bent to both sides. The fourth bending part 1212 is in contact with the engine cover outer plate 2, so that the second rib forms a closed cavity with the engine cover outer plate 2.

[0039] By providing a ring of reinforcement area 12 in the weakening area 10, the strength of the edge area where pedestrians are not the main force point is increased on the basis of ensuring the safety of pedestrians in the central position, which can prevent excessive deformation of the engine cover during a collision. This helps to maintain the overall structural stability of the engine cover and avoid the edge part from breaking or splashing during the collision process, causing secondary injury to pedestrians.

[0040] At the same time, the provision of the reinforcement area 12 can provide better support for the engine compartment 3 when the vehicle is subjected to a frontal collision, which helps to protect the safety of the occupants. The engine compartment 3 inner plate with weakening area 10 and reinforcement area 12 can better balance pedestrian protection and structural strength, improve the pedestrian protection crash test score under the condition of meeting the overall performance of the engine cover.

[0041] It can be understood that the weakening area 10, the assembly area 11 and the reinforcement area 12 can be different areas of the same sheet metal, or different sheet metals assembled together.

[0042] In one embodiment, as shown in Figure 3 The weakening area 10 is also provided with a plurality of through holes 102 arranged at intervals.

[0043] The provision of the through hole 102 can further weaken the stiffness of the engine cover inner plate 1 and improve the pedestrian protection crash test score to a greater extent. The through hole 102 can be provided at the edge of the weakening area 10. Through the combination of the vertical rib 101 and the through hole 102, the energy absorption capacity of the central area of the engine inner plate is further improved, so as to better protect pedestrians.

[0044] In another embodiment, the fixing member 111 is a hem structure, which is used to wrap the edge of the outer hood panel 2 to realize the assembly of the inner hood panel 1 and the outer hood panel 2.

[0045] The assembly of the inner hood panel 1 and the outer hood panel 2 by using the hem structure can reduce the gap and the air flow between the inner hood panel 1 and the outer hood panel 2, so as to reduce the air resistance.

[0046] In the embodiment of the present application, as shown in Figure 3 The inner hood panel 1 can further include a hinge mounting structure 112, which is used to mount a hinge for fixing the inner hood panel 1 and the outer hood panel 2 in the engine compartment 3.

[0047] For example, the hinge can include a fixed end and a rotating end, and the hinge mounting structure 112 can include a threaded hole for mounting the hinge. The rotating end of the hinge is fixed on the inner hood panel by using the cooperation of the bolt and the threaded hole, and the fixed end is fixed on the edge of the engine compartment 3. When the inner hood panel is lifted, the inner hood panel and the outer hood panel are rotated relative to the engine compartment 3 via the hinge to realize the opening and closing operation.

[0048] According to the preferred experimental data of the experimental results of the inventor, the present application provides several design sizes. For example, in an embodiment, the overhanging height of the second bending part 1012 relative to the outer hood panel 2 is 6 mm to 10 mm; the overhanging height of the third bending part 1211 relative to the outer hood panel 2 is 45 mm to 55 mm. In another embodiment, the width of the third bending part 1211 is 45 mm to 55 mm. In another embodiment, the length or width of the unit grid of the grid structure is 100 mm to 140 mm.

[0049] According to the above size data, the reinforcing rib 121 of the reinforcing area 12 for reinforcement has a size greater than the vertical rib 101 of the weakening area 10, so as to ensure the torsional strength of the entire inner hood panel 1 under the premise of protecting pedestrians.

[0050] It can be understood that the unit grid of the grid structure can be a standard rectangle or other quadrilateral structure, and the specific shape is determined according to the size of the actual hood. Because the length or width of the unit grid of the grid structure is 100 mm to 140 mm, the area of the unit grid of the grid structure is between 100 mm x 100 mm to 140 mm x 140 mm.

[0051] In an embodiment, as shown in Figure 3As shown, the inner hood panel 1 and the outer hood panel 2 are installed on the engine compartment 3 together, and the reinforced area 12 can further include: a lock body 122 for locking the inner hood panel 1 on the engine compartment 3; or a rubber plug in contact with the edge of the engine compartment 3 for blocking sundries from entering the engine compartment 3.

[0052] In summary, the embodiment of the present application provides an inner hood panel 1 which weakens the center area most easily collided by pedestrians by the open vertical rib 101 structure, and the arranged vertical ribs 101 present a grid shape, further weakening the structural strength of the center area, which is helpful for pedestrian protection. The present application further provides a scheme of reinforcing the edge, a further weakening scheme and detailed design size.

[0053] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, which should be considered as the protection scope of the present application.

Claims

1. An engine hood inner panel characterized by, The engine cover inner plate (1) is installed below the engine cover outer plate (2), the engine cover inner plate (1) and the engine cover outer plate (2) are both sheet metal structures, the engine cover inner plate (1) comprises: The weakening area (10) is provided with a plurality of vertical ribs (101) arranged at intervals, a plurality of the vertical ribs (101) and the edges of the weakening area (10) form a grid structure, the cross section of the vertical rib (101) comprises a first bending part (1011) and a second bending part (1012), the first bending part (1011) is attached to the engine cover outer plate (2), the second bending part (1012) is first bent downward from both ends of the first bending part (1011) and then bent to both sides, and the second bending part (1012) is suspended below the engine cover outer plate (2); The assembly area (11) is arranged around the weakening area (10), and the assembly area (11) is provided with a plurality of fixing members (111), and the fixing members (111) are used to fix the engine cover inner plate (1) below the engine cover outer plate (2).

2. The inner hood panel of claim 1, wherein, The first bending part (1011) and the engine cover outer plate (2) are coated with glue (1013).

3. The inner hood panel of claim 1, wherein, The engine cover inner plate (1) further comprises: The reinforcing area (12) is sheet metal at the junction of the weakening area (10) and the assembly area (11), the reinforcing area (12) comprises a reinforcing rib (121), the reinforcing rib (121) extends along the edge of the weakening area (10), the cross section of the reinforcing rib (121) comprises a third bending part (1211) and a fourth bending part (1212), the third bending part (1211) is suspended below the engine cover outer plate (2), the fourth bending part (1212) is first bent upward from both ends of the third bending part (1211) and then bent to both sides, and the fourth bending part (1212) is attached to the engine cover outer plate (2), so that the reinforcing rib (121) and the engine cover outer plate (2) form a closed cavity.

4. The inner hood panel of claim 1, wherein, The weakening area (10) is further provided with a plurality of through holes (102) arranged at intervals.

5. The engine hood inner panel according to claim 1, characterized in that, The fixing member (111) is a hem structure, and the hem structure is used to wrap the edge of the engine cover outer plate (2) to realize the assembly of the engine cover inner plate (1) and the engine cover outer plate (2).

6. The engine hood inner panel according to claim 1, characterized by, The engine cover inner plate (1) further comprises: The hinge mounting structure (112) is used to mount a hinge, and the hinge is used to fix the engine cover inner plate (1) and the engine cover outer plate (2) in the engine compartment.

7. The engine cover inner plate according to claim 3, wherein The overhanging height of the second bending part (1012) compared to the engine cover outer plate (2) is 6-10 mm; The overhanging height of the third bending part (1211) compared to the engine cover outer plate (2) is 45-55 mm.

8. The inner hood panel of claim 3, wherein, The third bending part (1211) has a width of 45-55 mm.

9. The inner hood panel of claim 1, wherein, The length or width of the unit grid of the grid structure is 100-140 mm.

10. The inner hood panel of claim 3, wherein, The engine hood inner plate (1) and the engine hood outer plate (2) are installed on the engine compartment together, and the reinforcing area further comprises: a lock body (122) for locking the engine hood inner plate (1) on the engine compartment; or a rubber plug in abutment with the edge of the engine compartment for blocking sundries from entering the engine compartment.

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